6 Data acquisition 6.1 Data acquisition with Simatic WinCC

IMPORTANT:
With the WinCC Runtime license you get the right to do 1-hour configuration. After this hour
you will be asked to save your changes. To proceed, you will have to close and restart the
WinCC Explorer.
Archive Parameters.
Tag logging configuration screen will open. If you
select the properties of the „Daten“ archive and
open the „Archive Parameters“ register, you find
top right the number of entries in your archive. This
is the number of values stored in the archive before
new values will override them. You should not
select a value > 65000 if you want to use the data
in Microsoft Excel. Under this value you find the
number of byte/entry. This multiplied by the number
of entries will be the size needed on hard disc.
ATTENTION:
Old values will be erased by new ones after the
number of entries is reached.
For the tags you can determine the cycle time for each value separately. It is recommended to use
quick rates only for values where you expect quick changes.
There is a difference between acquisition of the system and the archiving. Under the point
„Archiving/Display“ you can enter a factor from how many actual values there should be made one
stored value. In the second register „Parameters“ you can enter the way how the stored value shall be
made from the actual values. Standard is „Mean value“ here.
Minimum acquisition and archiving time of this system is 1 Second.
Archive tag, name and cycle time
Parameters for archive variable
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